added deprecation warning #210
added deprecation warning #210

gitqwerty777/myGspread,finoptimal/gspread,amleczko/gspread,habibmasuro/gspread,burnash/gspread,paulfitz/gspread,nateyoder/gspread,suminb/gspread,JPO1/gspread,wbrp/gspread,msuozzo/gspread,tjyang/gspread,dimartiro/gspread,ShivaShinde/gspread,peczony/gspread,azenk/gspread,brakhane/gspread,m4rc1e/gspread,KandarpShah/gspread,rohit91/gspread,jkhoogland/gspread,DanielHabib/gspread,Squarespace/gspread